Session 41 Jonas Ringsberg

Founder LIGHTHOUSE MARITIME COMPETENCE CENTRE

Maritime Safety –
from Basic Science to Innovation

Professor Jonas W Ringsberg
Head of Division of Marine Design
Department of Shipping and Marine Technology
Chalmers University of Technology

Professor Jonas Ringsberg, 2012‐01‐12


• Basic Science
– Development of scientific theories.
– Research is done without consideration of its application.
– Aims to answer phenomena and possible mechanisms proposed in applied
science.
• Applied Science
– Applying knowledge from one or more natural scientific fields to practical
problems.
– Many applied sciences can be considered forms of engineering.
• Innovation
– Creation of better or more effective products, processes, services,
technologies, or ideas that are accepted by markets, governments, and
society.


OUTLINE OF PRESENTATION

• Introduction
• Research methodology
– Basic Science, Applied Science,
Innovation
• Examples
– Crashworthy structures
– Fatigue routing
• Concluding remarks …


INTRODUCTION: Theme areas

Business Ship
Economy, maritime logistics and
maritime law

Cargo Ship
Ship design, cargo handling,
systems and marine structures

Eco Ship
Maritime environment, efficiency and
energy consumption

Ergo Ship
Human factors and working
Environment

Info Ship
ICT in maritime operation
and business

Safe Ship
Maritime safety and security


INTRODUCTION: Cargo Ship

• Cargo Ship mission
– Providing knowledge and tools for how to shape marine structures to be
safe, sustainable and efficient

• Maritime Safety (this presentation)
– Marine structures
– Hydrodynamics
– Stability and maneuvering


INTRODUCTION: Statistics

Not an acceptable
level, how to solve?



CAUSE?
- Navigational?
- Non-navigational?



Collision
&
Fatigue


RESEARCH METHODOLOGY

STUDY – ASSESS – IMPROVE – DEVELOP:
(Basic Science – Applied Science – Innovation)
• ship and offshore concepts based on a
need, functionality or safety‐driven
request

• technical and structural design solutions
for marine structures

• simulation procedures (development of
new methods)



Basic Science Applied Science

• Formulate problem • Formulate problem
• Design experiment or • Make conceptual model
field measurement • Make mathematical model
• Set up equipment • Find data
• Collect data • Simulate
• Interpret • Validate

Knowledge “Tools”
[Rickard Bensow (2011)]



• Formulate problem
• Make conceptual model
• Make mathematical model
• Simulate
• Design experiment or field
measurement
• Collect data
• Validate
• Simulate
• Interpret

Design & Prediction


EXAMPLE 1: Crashworthy structures



• Should protect
– the humans
– the environment
– the property/cargo

• Different concepts
– energy‐absorbing
structures
– deformation‐tolerant
structures



Sea state Wave encounter direction
with respect to damage

Tcapsize
opening

Location of Shape of Size of damage
damage damage

E[Tcapsize]
V[Tcapsize]



Corrugated inner
side‐shell
200 Web plate

200 Welds

30˚
200

Unit: mm



• Striking bow fracture penetration depth in 10 points
– Reference structure: 1.50‐2.04 m
– Corrugated structures: 2.98‐3.96 m

B/5

Water line

Reference Corrugated
structure structure

CL


EXAMPLE 2: Fatigue routing

ETA / weather

Fatigue/durability

Fuel



U.S. EU



• Hydrodynamic simulation

• Finite element analyses
– Global model
– Sub models
Outer shell
– Local models
Inner shell



Whipping included

Whipping excluded



Accumulated fatigue damage during 20 minutes (Hs=5m)
iiAM iAM

viAM vAM


CONCLUDING REMARKS …

ARCTIC ROUTES


Session 41 Jonas Ringsberg

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